[jboss-jira] [JBoss JIRA] Commented: (JBCOMMON-15) In BasicThreadPool allow the queue passed to MinPooledExecutor to be configurable.

[Ron Sigal (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBCOMMON-15?page=comments#action_12357562 ] 
            
Ron Sigal commented on JBCOMMON-15:
-----------------------------------

I apologize if I inadvertently reopened an old issue.  The description of the race condition solved by MinPooledExecutor and the description of a supposed deadlock given in http://altair.cs.oswego.edu/pipermail/concurrency-interest/2004-September/001037.html seemed sufficiently different for me to think they were different problems.  E.g., the race solved by MinPooledExecutor assumes an unused thread, and the other problem starts with the assumption that all threads are in use.  Moreover, in his reply Doug Lea seems to accept the deadlock description.  However, I admit that I didn't look at the code to see if the underlying problems could be related. In any case, thanks for responding.

> In BasicThreadPool allow the queue passed to MinPooledExecutor to be configurable.
> ----------------------------------------------------------------------------------
>
>                 Key: JBCOMMON-15
>                 URL: http://jira.jboss.com/jira/browse/JBCOMMON-15
>             Project: JBoss Common
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 1.0.4.GA
>            Reporter: Ron Sigal
>
> According to http://altair.cs.oswego.edu/pipermail/concurrency-interest/2004-September/001037.html, "in certain circumstances the combination of PooledExecutor with BoundedLinkedQueue with a waitWhenBlocked policy can lead to deadlock." 
> A post in the Remoting forum, http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995334#3995334, indicates that a deadlock has been detected in Remoting due to its use of BasicThreadPool.  In response, the blocking policy in Remoting has been changed from WAIT to RUN, though WAIT would be preferable.  The poster in  http://altair.cs.oswego.edu/pipermail/concurrency-interest/2004-September/001037.html indicates that an alternative solution is to use BoundedBuffer in place of BoundedLinkedQueue.
> It would be useful, therefore, if a queue could be passed to the BasicThreadPool constructor.

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